.loading{  
    width:210px;  
    height:56px;  
    position: absolute;  
    top:50%;  
    left:calc(50% - 100px);  
    line-height:56px;  
    color:#fff;  
    padding-left:60px;  
    font-size:15px;  
    background: #000 url(/assets/img/loading.gif) no-repeat 10px 50%;  
    opacity: 0.7;  
    z-index:9999;  
    -moz-border-radius:20px;  
    -webkit-border-radius:20px;  
    border-radius:20px;  
    filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70);  
}  